Concrete-insert.



F. DONLEY.

CONCRETE INSERT.

APPLICAHONHLED rov.17l 1913.

Patented May 7,1918.

f 7l Z,

of insertion in structures ofplasticgnaterial,-

UNITED STATES. AEFE'@ FORD DONLEY, or CLEVELAND, oHIo, AssIGNoE To THE DoNLEr, EnorHEns courrant?, i

oEcLEvELAND, oHIo, A conroaarron.

.CONCRETE-INSEEL Patented May?, i918. v

Application nea'mverlte'r 17,1913. sum1 E0. 501,347.

To all whom it 'may concern:

Be it known that- I, FORD DoNrjEr, of

Cleveland, in the county of`Cuyahoga and State of Ohio, have invented new and useful Improvements in Concrete-Inserts, of which the following is a specification'.

This invention relates to devices'capable such as concrete, and adapted to receive and holda removable bolt.

The objects of my present invention are to provide in an insert for a concrete structure means for securingv a bolt thereto, which maybe more easily inserted or removed than heretofore; to provide, aV single removable bolt-plate permitting of universal adjustment of theposition ofthe bolt within the circle of the device; toProvide for'securing an insert shell to a form-board or matrix without leaving the fastening means in the concrete, or breaking out portions of the latter and to secure strength,

convenience and 'a neat appearance.

Referring now to the accompanying -drawings'illustrating embodiments yof my invention Figure 1 is a'sectlona'l view, partly 1n side elevation, of the insert shell temporarily secured to a form-board with concrete packed about it.

Fig. 2 is a section .of the insert taken on line 2 2 of Fig. 4f.

Fig. 3 is a section of the insert shell showing a bolt with its anchor-plate being in serted therein.

Fig. l is a plan'view of the insert with vits cover partly broken away.

Fig. 5 is a bottom view of the shell.

Fig. -6 isa bottom view of an anchorplate.

The reference letter 'a indicates an annular shell ofsteel, semi-steel, or other suitable metal, having a larger diameter at one end than at the other, -being preferably bellshaped with its 'sides approximating a parabolic curve, as shown, and provided with an interior flange l) at its smaller end. A. suitable cover c, preferably of sheet iron or.

steel, is litted to the larger end of the shell a, being provided with a peripheral flange if, or any other suitable means for keeping itin place. rlhus the said sli'ell and its cover is adapted to be embedded in concrete, or other plastic material d, as shown in Fig.

l, with its flanged 4end l 'flush with the sur- 5 face of the structure.

The smaller end of the shell t isplacedagainst a form lor mold board m for a concrete ceiling, beam, wall, post, floor, or what.-

thou'gh temporarily, secured thereto by nails "Z driven into said .board inside of the shell with their .headsengaging the flange l). To

further vprevent the/shell being turned everv the structuremay be, vand isv rigidly,

about,I provide shallow notches fn, Fig. 5,

that no nails, or other temporary fastenings, 7 0

are left in, or projecting from the hardcned concrete structure.'

It is obvious that, upon the hardening of the plastic mass al, theshell a is firmly anchored thereinl by its liaring shape. I am l 'aware that a -conic'al shape has been stiggested for the shell a, but by making said shell bell-shaped, Aas shown, l secure the strongestpossible form 'of the`concrete ring projecting from the mass about the 'shell and 80 serving to anchor the latter in-place; be-

cause the parabolic curved lsection shown .makes with the surface `.of the structure a larger angle than the 'straightline of a conical dovetail would make, thereby strengthening the salient angle of the concrete where Vit hasthegreatest tendency to crumble and '.fracture. But if additional anchorage is desired, l form two or more ears fr on the outside ofthe shell a, havingapertures o theree@ in Fig. l. Said. ears also serve to prevent rotary displacement of the shell.

The y'anchor-plate, or bolt washer, 79, may have the contour of a circular Zone; being a circular plate of steel, or other strong metal,

rabbeted out on its under side, as shown at it, so as to lit loosely over and rest upon the flange o of the embedded shell,and having equal circular segments cut raway from opposite sides of it, so that the edges'f-t are straight and parallel with-each other. But

l prefer to bevel the edges of the plate 70 on one end, aslat fv-fv, which permits of the plate being introduced into a more shallow shell a, and also serves to better balance the plate. Starting at the center of the plate 72, and extending parallel with the sides t, and

preferably through the wider -end of the plate, is a slot s fitted to receive loosely the shank of the anchor-bolt j. The upper-face of the plate is rabbeted out about the slot,

as at lo, to form an elongated c oun'tersinkin which the'headi of the bolt may seat or slide, but cannot turn unless the plate p turns with it.-

. The' shell a of the insert with its cover c being rmly and permanently fixed in thev ,concrete structuregland it-being desired to secure a bracket, hanger, or other. device to the structure, abolt j is first inserted-through vthe slot s in the plate p, and the plate inserted, larger end irst, diagonally into the shell, as ,shown vin14`ig. 3, and then tilted t'o a horizontal position when the beveled edges"A o have cleared the flange b of the shell, and

brought to rest on said ange, as in Figs. 2 and 4. 'I o remove the boltand its plate the operation is simply 4reversed. It is obvious that plates for different sized bolts may be used in t e same shell a.

It will now be readilyunderstood that a universal adjustment is secured, since the boltj may slide radially to any position., and may be turned or swung, carrying the plate p ,with it, throughout the circle of the shell a, limited only byl the length of the slot s.

But `when the boltis tightened upon the de-,

anchored-to the concrete structure.

Being'assi ee of an interest erein, I

am aware o the pending 4applic/ation of William A von Wolffradt for a p'atent .on

` a concrete insert, iiled Oct. 13, 19,13, and

serially numbered 794,812, showing a pair of anchor-plates in'-a conical shell. Therefore, I do not claim broadly anything shown in the said application, but further point out and distinctly claim as my invention :w-

1. .In combination with an annular insert shell for plastic material, an internal flange in saidshell, a circular Zone-shaped anchorplate capable of insertion into the open end of said shell and tted to rotate upon the inside of said iange, and a radial slot in said anchor-plate adapted to receive and4 seat an anchor-bolt so that said plate may be turnedwithsaid bolt. l

2. In combination with an annular insert shell for plastic material, an internal iange in saidshell, an anchor-plate having the contouror a circular zone beveled off at one 'end and itted, to be inserted into the open end'of said shell' and -tor rotate upon said` ceive and engage means for temporarily fastening said shell to aA matrix, and boltanchoring means engageable with said flange and insertible through the smaller end of said shell.

In testimony whereof I aiiix my signature in thepresence of two subscribing witnesses,

at Cleveland, Ohio, thisy 14th day of November, 1913.

FORD DONLEY.

-Witnessesz 'RAYMOND B. HOPP'R, l E. W0RTHINGT0N. 

